How to implement SQL in reverse order and normal order?

In SQL, we can use the ORDER BY clause to sort the query results, and we can choose either ascending (ASC) or descending (DESC) order.

To sort in ascending order based on a specific column, you can use the following syntax:

SELECT 列名1, 列名2, ...
FROM 表名
ORDER BY 列名 ASC;

To sort in descending order based on a specific column, you can use the following syntax:

SELECT 列名1, 列名2, ...
FROM 表名
ORDER BY 列名 DESC;

For example, if we have a table named “employees” with columns “first_name” and “last_name”, we can sort in ascending order by the “last_name” column using the following statement:

SELECT first_name, last_name
FROM employees
ORDER BY last_name ASC;

Alternatively, you can sort in descending order by the “last_name” column using the following statement:

SELECT first_name, last_name
FROM employees
ORDER BY last_name DESC;